#include #include using namespace metal; struct Inputs { float4 a; float4 b; }; struct Outputs { float4 sk_FragColor [[color(0)]]; }; fragment Outputs fragmentMain(Inputs _in [[stage_in]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) { Outputs _outputStruct; thread Outputs* _out = &_outputStruct; _out->sk_FragColor.x = float((_in.a == _in.b).x ? 1 : 0); return *_out; }